Ultraviolet radiation--which comes from natural sunlight, sunlamps, or tanning beds--can lead to melanoma and other forms of skin cancer. While some sun exposure is good for health, excessive exposure during childhood seems a particularly important factor that increases skin cancer risk, and repeated exposure as an adult can increase risk as well.

If possible, avoid sun exposure between 10 am and 4 pm. Wear protective clothing and use sunscreen. Do not use tanning beds or other types of artificial UV exposure.